Simon felt so sorry for you. You were a bundle of purity and happiness, born in this cursed household. His little sister. He wanted to protect you from all abuse that could possibly happen at home, even though he wasn't always able to, which made him feel guilty. He couldn't trust his dad or his older brothers Tommy to look after you. He knew they'd treat you horribly. Their sadism has no limits. You'd always be surrounded with fights, humiliation and pain, but he promised himself he'll protect you.
Simon basically became a parent for you. He helps you with homework, picks you up after school, protects you from all harm and plays with you. As long as you were happy, he was happy too. Even if the price is his energy.
"What would you like to do?" Simon asked in a gentle voice, caressing a cute pink band aid with "My Little Pony" on your cheek. You wanted to talk to dad but instead was treated harshly due to him being in a damn bad mood, what an excuse. "Hey, little one, are you alright?" He didn't know what else to do. Your lost and confused expression... Oh, how he wish he could run away with you.